Malicious PDF — malware analysis report

Static analysis result for SHA-256 370184137aa1a61b…

MALICIOUS

PDF

75.6 KB Created: 2021-02-28 09:09:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 42dcb9a2b0586c56c826265871c20abb SHA-1: fc9136021498a09ad9fc192c0a44777cb0c64fe4 SHA-256: 370184137aa1a61bd24de023e61ec2ee68d7e2a3ab6c9829e79ade7ce6f46949
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to obtaining a driver's license, which is then used to redirect users to a network of potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9263

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://zajinet.ru/aws?utm_term=how+to+get+federal+id+driver%2527s+license PDF link annotation
    • http://hydra.moscow/batman_the_dark_knight_movie_tamilkfea6.pdfIn PDF document text
    • http://dezodon.22web.org/vexedajujumobivoj.pdfIn PDF document text
    • http://lazadacostumercenter.com/57084865543b97b1.pdfIn PDF document text
    • http://citimart.online/85279503804zbkoq.pdfIn PDF document text
    • https://cdn.sqhk.co/rureroso/Y8qEigs/10172524135.pdfIn PDF document text
    • https://cdn.sqhk.co/devuzemalut/hhcFlge/mindspring_imap_email_settings.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/chejafE/call_simulator_creepy_momo.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/a3DgjHh/tujosaf.pdfIn PDF document text
    • http://pollsexpert.com/21271150163hhc0n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dadupawo/xupuxukuwebowinomugeti.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/79818095457.pdfIn PDF document text
    • http://zuputes.atwebpages.com/95308899735.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/countif_date_range_google_spreadsheet.pdfIn PDF document text
    • http://zowuxepalaget.epizy.com/tropical_smoothie_application.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE694 5124 bytes
SHA-256: 3b6bbd7812cd5e7de8184ec15fa00c148b738667a6fedc328c85b334b6246ce4
font_01_sfnt_off0000f831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF831 11096 bytes
SHA-256: a4933b2ab4c8a969f56a356c1321bd3e4e6ac252ae09bd5bfe88a0e8a8e57a05
font_02_sfnt_off00011e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E07 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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